Modular heat sink



FIG. 1 is a perspective view of a modular heat sink according to the present invention.

FIG. 2 is a side elevation view of the modular heat sink illustrated in FIG. 1.

FIG. 3 is a top plan view of the modular heat sink illustrated in FIG. 1; and,

FIG. 4 is a bottom plan view of the modular heat sink illustrated in FIG. 1. 

CLAIM The ornamental design of a modular heat sink, as shown and described. 